In the wake of the May 23 boil water alert, David Shaff, Water Bureau administrator, said reservoirs at Washington Park and Mt. Tabor are a problem. "They are vulnerable to post-treatment contamination, Shaff said in an interview, saying the reservoirs are "an obvious vulnerability."

Portland has until Dec. 31 2015 to comply with the federal requirements and remove the open air reservoirs from the city's drinking water supply. That's led to a flurry of construction activity around town. Here's an update on all the moving pieces and construction projects.

Mt. Tabor Reservoirs

Capacity: Two reservoirs currently in use with a capacity of 12 million gallons and 50 million gallons. A third 70 million gallon facility, is currently being used to hold water diverted for the urination incident and boil water alert. Reservoir 2 was decommissioned years ago.

Disconnect: The reservoirs will be disconnected from the Bull Run Watershed-fed drinking water system starting in the spring of 2015.

Powell Butte Reservoirs

Capacity: Two covered reservoirs of 50 million gallons, one came online in 1981, the other covered reservoir is nearing completion.

Cost: Total costs of the project is $138 million, but the bureau anticipates coming in under budget. Issues: The DEQ fined the Water Bureau $40,800 for issues that led to repeated discharges of chlorinated water into Johnson Creek last fall. Shaff said "concrete leaks, that's a given," but added the leaks lasted longer than expected. The contractor took steps to "dechlorinate" the water, a spokesman said, but didn't do enough. They've since rectified the error.

Completion: Will be available for service this summer

Kelly Butte Reservoir

Capacity: Used to be 10 million gallons, are replacing that reservoir with 25 million gallons covered reservoir